SRAM RED AXS Crank Arm Assembly - 175mm 8-Bolt Direct Mount DUB Spindle Interface Natural Carbon D1. The SRAM RED AXS Crank Arm Assembly features hollow carbon Exogram crank arms for a lightweight strong and elegant crank. It can be paired with any SRAM AXS spider or integrated chainring with or without power.The 8-bolt interface is compatible with power and non-power AXS spiders and integrated chainringsNot compatible with SRAMs 3-bolt direct mount interfaceHollow Exogram carbon armsSpider and chainrings sold separately